Electrical condenser



Nov. -6, 1928.

P. E. GILLING ELECTRICAL CONDENSER Filed Feb. 25, 1925 G L W A TTOH/VEV Patented Nov. 6, 1928.

UNITED STATES v 1,690,675 PATENT OFFICE.

PRESTON E. GILLING, OF EAST ORANGE, NEW JERSEY, ASSIGNOR T0 RADIO CON- DENSER COMPANY, OF CAMDEN, NEW JERSEY.

ELECTRICAL CONDENSER.

Application filed February 25, 1925 Serial No. 11,490.

This invention relates to an electrical condenser in which a stack of alternate layers of mica and metal foil are built up and held between :1 pair of binding or bolster plates through the medium of clamping members which engage, not only binding members, but theends of the metal foil which have alternate layers brought out at the opposlte ends of the condenser stack.

The condenser stack per se, may be constructed in any suitable manner such as that described in Van Deventer Patent 1,181,623 issued May 2, 1916, or in the application of Harry A. Hatch, Serial No. 417,347 filed October 16, 1920, now Patent 1,574,424, issued Feb. 23, 1926.

The condenser herein disclosed is particularly adapted for use in connection with radio circuits and apparatus, although it is to be understood that it is not limited exclusively to this kind of use.

In the Van Deventer patent, and Hatch application above referred to, certain types of clamping terminals are shown and described. The clamping member herein disclosed differs from the terminals of said patent and application referred to, or other prior art, in the details which will be hereinafter pointed out.

One of the-objects of this invention is to provide a clamping member which not only acts to hold the condenser stack together and act as a terminal, but, to provide means by which wires or conductors may be quickly attached or detached from the treminal.

In my application Serial No. 10,214 filed February 19, 1925, I have shown and described a certain form of a quick detachable clamping terminal, my present invention being directed to a modification of the quick attachable and detachable features.

Another object of my invention is to provide a terminal in which the whole condenser may be shifted on the conductors or bus-bars, for the purpose of balancing the radio set when the condenser is'used therein.

My present invention will be best understood by reference to. the drawing, in. which Figure 1 is a plan view of the complete condenser showing a pair of conductors slidably attached thereto.

Figure 2 is a side view of Fig. 1, and

Figure 3 is an end view of Fig. 1.

Figure 4 is a plan view of a modified form in which the wire connecting clips are on the edges of the terminal clamps.

Figure 5 is a side view of Fig. 4 without the conductors, while Figure 6 is an end view of Fig. 4.

In the various views, 1 and 2 are terminal clamps having ears 3 which are bent downward into slots or openings 4 in the binding or bolster plates 5 and 6 that are used for binding the condenser stack securely together so that the condenser will retain indefinitely its rated capacity.

In Figures 1, 2, and 3 the terminal clamps l and 2 each have ears 6 and 7 formed outwardly and each of these ears have perforations 8 which are in the same vertical plane, but in which the plane of the holes themselves are at an angle so that when the conductors,

or bus-bars 9 and 10 are inserted through the perforations or holes 8, a good gripping contact on the conductors 9 and 10 is obtained, as will be clearly seen from the drawings. The condenser is entirely supported by the conductors 9 and 10 and is slidable along these conductors to any desired position which feature may be utilized in tuning the various pieces of apparatus when the con- 'denser is used in a radio receiving set.

In Figures 4, 5, and 6, the ears 6 and 7 are punched from the material on the edge of the clam ingterminal instead of from the materia on the arm of the terminal. However, the general result is the same. By this arrangement it will be seen that the condenser may be quickly connected in a circuit as no soldering is required to make connection to the clamping terminals, it being understood, of course, that the clamping terminals 1 and 2 make connection with the metal foil elements of the condenser all as set forth in the patent and applications previously referred to. It is also to be understood that the bolster or clamping plates 5 and 6 are of suitable stiff insulating material.

Having thus described my invention what I claim is:

1. For a condenser of the class described, a clamping terminal member having parts for embracing the stack with means for retaining the member in position on the stack and means for attaching a conductor thereto comprising a pair of perforated ears formed from the memberso that the center line of the perforations are substantially in alignment.

2. For a condenser of the class described, a clamping terminalmember having parts for embracing the stack with means for retaining the member in position on the stack and means for slidably engaging a conductor com-.

prising a pair of perforated ears formed from the member whereby the conductor may be readily passed through the perforations.

3. For a condenser of the class described, a clamping terminal member having parts for embracing the stack with means for retaining the member in position on the stack and means for slidably mounting the condenser terminal on a conductor, comprising a pair of perforated ears set at an angle to each other, but such that a conductor may be readily passed through the perforations.

4. For a condenser of the class described, a clamping member therefor, having at least a dual function, first that of a clamp for holding the condenser stack in a compressed state and secondly a slidable quick attachable and detachable terminal having a pair of perforated ears arranged in tandem and at an angle whereby the perforations are positioned in intersecting planes, and in such alignment that a conductor passed through the perforations is slidably gripped by said ears.

5. A combined clamp, and quick attachable and detachable terminal for a condenser, comprising parts for embracing and clamping the condenser stack and for making contact with at least a part of the elements thereof and integral ears formed at an angle to each other but in tandem relation to each other, said ears having perforations disposed in intersectin planes and in such alignment that a conductor when inserted through theperforations is gripped to make electrical contact.

In testimony whereof, I afiix my signature.

PRESTON E. GILLING. 

